Snap limit gauge



Feb.- 2 1926.

B. H. BLOOD SNAP LIMIT GAUGE Filed April 9. 1924 III/ll rill gglw A TTUHNE Y Patented Feb. 2, 1926.

UNITED srarss PATENT OFFICE.

BRYANT H. BLOOD, OF HARTFORD, CONNECTICUT, ASSIGN OR T PRATT 80 WHITNEY COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

SNAP LIMIT GAUGE.

Application filed April 9, 1924. Serial No. 705,262.

To all whom. it may concern:

Be it known that I, BRYANT I-I. BLOOD, a citizen of the United States, residing at Hartford, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Snap Limit Gauges, of which the following is a specification.

This invention relates to gauges and particularly to a snap gauge having two pairs of anvils, preferably parallelly arranged, which maybe set for maximum and minimum dimensions.

It is an object of the present invention to provide an improved and simplified form of adjusting means for the anvils of sn'ap gauges so that they may be quickly adjusted and securely locked in fixed position. One of the features of the present invention is that the anvils are independently adjustable in one direction by threaded means axially disposed to the respective anvils and forced in the opposite direction by single means engaging both of the anvils.

Another feature of advantage is that a strap or saddle member is provided engaging oppositely flattened surfaces on the anvils and extending within the space between the anvils on one side of the frame. This saddle is forced in one direction by interengaging threaded means and engages the anvils on diametrically opposite points relative to the axis so that no tendency for the anvil to bend or to be forced toone side of its hole is introduced.

The construction of these adjusting means for the anvils is such that all of the stresses occasioned by adjusting and clamping the anvils extend axially with the anvils. There is no-tendency. therefore for the anvils to bend when they are clamped in position.

IVith the above and other objects in view, my invention consists in the features of construction and operation set forth in the following specification and illustrated in the accompanying drawing.

In the accompanying drawing annexed hereto and forming a part of this specificatron, I have shown two embodiments of the invention as applied to an outside dimension limit gauge but it will be understood that the invention can be otherwise embodied and that the drawing is not to be construed as defining or limiting the scope of the invention,.the claims appended to this specifica tion being relied upon for that purpose.

In the drawing:

Figure 1 is a view partly in cross section showing one form of the improved anvils and their adjusting means. i

Fig. 2 shows two views at right angles to each other of the anvils used in this embodiment of the invention.

Fig. 8 is a sectional view taken on line 3-3 of Fig. 1.

Fig. 4: is a view similar to Fig. 1 showing a second embodiment of the invention. 7

Fig. 5 isa sectional view of the anvil used in this form of the invention.

gig. 6 is a detail of the adjusting means, an

Fig. 7 shows detail views of the saddle member.

In the above mentioned drawings, I have shown forms of the invention which are now deemed preferable, but it is to be understood that changes and modifications may be made within the scope of the ap' pended claims without departing from the spirit of the invention.

Briefly, my invention in its broadest aspect comprises the following principal parts: first, a frame having aligned holes in opposite sides; second, opposed anvils adj ust-ably mounted within these holes; third, means inserted within these holes for adjustment of the anvil; fourth, a saddle or spacing member preferably engaging opposite flattened surfaces of the anvils; and fifth, a threaded member engaging and forc' ing this saddle member in one direction.

Referring more in detail to the figures of the drawing and particularly to Figs. 1, 2 and 3, I provide a frame 10 having two parallel holes 11 and 12 in each side of the frame, these pairs of holes 11 and 12 being .in alignment as clearly indicated in Fig. 1.

lVithin these holes are anvils 13 which may be adjusted axially therein. Adjacent the work contacting ends of these anvils 13 are oppositely disposed flattened surfaces 14 which may be engaged by a saddle member 15 disposed between the two anvils 13. The saddle member 15 is notched at opposite ends as shown at 16 so that it may engage the anvils 13 at their flattened portions 14. It is also made of such thickness that it may hend'slightly. In this way independent'ad justments of the anvils 13 may be made within slight variations by'adjustment of the means aligned with the anvils.

The form of the saddle member 15 .is clearly shown in the two views forming Fig. 7. Its forward surface iscut away in such a manner that the saddle 15 engages the anvils upon rounded portions 15 These are so disposed that they contact with the anvils 13 upon exactly diametrically opposite points. The stress therefore of the saddle member against the anvils will be axial and no tendency is introduced for the anvil to bend out of alignment or to be forced to one side of its hole. Also as shown in Fig. 7, the surface of the saddle member is cut away to accommodate the head of the bolt'18. This countersunk .portion 16 is of such form that the head .fits within it thus preventing the bolt 18 from rotating.

In order to force the anvils 13in one direction, the holes 11 and 12 within which the anvils 13 are mounted are threaded (in the preferred embodiment) through a portion of their length. This threadedportion is adjacent their rear ends into'which aheadless screw 17 may be threaded. Suitable adjustment of this screw 17 will :therefore force the anvil 13 within that hole in one direction.

material. the clamping screw maybe countersunk so In order to force the .anvils 13 in the opposite direction, a screw 18 is pro-- vided, its head bearing against the inside surface of the saddle member 15 and its threaded portion engaging a nut 19 preferably countersunk within the fram'e 10. It will be seen from this construction that the :anvils 13 may be readily adjusted by suitably positioning :the screws 17 engaging the rear surfaces of the anvils, andthe anvils clamped or rigidly held in place by means of the screw 18 hearing against the saddle member 15.

:the end of the threaded portion of-the holes 11 and 12 may be sealed with wax or. other Similarly, the nut 19 engaging that-the space above it-may be sealed.

In Fags. 4 to 6, a slight modification of the invention is shown. In this modification of the invention, the anvils 22 are provided with internally threaded portions 23 adapted to be engaged by screws 24. The screw 24, which is of the type having a countersunk head, is engaged upon a conical surface provided in a washer 25 placed in a small counterbored portion of the holes in the frame 21. By means of this screw 24, the anvils 22 are held in as retracted a position as possible. Inorder to rigidly retain the anvils -22 in position sand to force them forwardly or in the opposite direction, a screw 26 is provided extending through a threaded ,portion of the frame 21 and which bears against therear face of a saddle member 27 similar to that used in a the form shown in Figs. 1, 2 and 3.' The screw .26, however, does not pass through the saddle member 27 but is forced against its rear face. 26, the .anvils 22 may be locked in any adjusted position. It will be understood that the anvils on one side only of the frame may be provided with the adjusting means shown 'and described. The anvils on the opposite side of the frame may be fixed permanently in position or may be, if desired, simple anvil blocks or plates rigidly held against the frame.

In both embodiments of the invention, the .anvils are adjusted and retained in position by means extending parallelly with the anvils. Theyalso are prevented from rotating by the same means. Also all adjustments of the anvils aremade from the outside opposite ends of the frame .at which ends .all of the screws are closely grouped for convenience of adjusting them.

lVhat I claim is:

1. An adjustable limit gauge comprising in combination a frame, ,a pair ofparallelly disposed anvils adjustably mountedat one side of the frame, :means to independently adjust the anvils in one direction, and common acting means to force the anvils in the opposite direction.

2. An adjustable limit gauge comprising 'in'eombi-natiom-a frame, a pair of parallelly disposed anvils adjustabl-y mounted at one side of the frame, means to independently adjust the anvils in one direction, a plate engaging both of said anvils and preventing their rotation,.and means engaging said plate to zforcesaid anvils in the opposite dimotion.

3. A11 adjustable limit .gaugecomprising in combination, a frame, a pair of ,parallelly disposed anvi'lsadjustably mounted at one side of the frame, means axially aligned with the anvils for adjusting them independently in one direction, a plate extending between and engaging each ofsaid anvils,

and means contacting with said plate to force said anvils in the opposite dlrection.

4. An ad ustable limit gauge comprlsmg By these threaded members 24 and in combination, a frame, a pair of parallelly gaging their flattened portions whereby the disposed anvils adjustably mounted at one anvils are held against rotation, and means side of the frame, means axially aligned contacting With said plate to force said an- 10 with the anvils for adjusting them indevils in the opposite direction.

fi pendently in one direction, flattened por- In testimony whereof, I hereto aflix my tions on opposite sides of said anvils, a signature. plate extending between said anvils and en BRYANT H. BLOOD. 

